It really depends on the demo binding in question.The term "demo" binding refers to a binding that is used for demo purposes. that has a large boot sole adjustment range.There are/were demo bindings with ONLY the rear having a large adjustment range.Then along came ..and the term "full" demo..meaning that the front can be moved back and forth too.Savvy skiers had this figgered out in the early 80's for nailing down the sweet spot on the ski.Some skis are HYPER critical about the boot centre in the ski centre..others it matters little.
have a few pairs of boots..same size..just less than a (measured)305 to 320.The Sal.s I have will NOT tolerate this length difference.Enter demo bindings.I mount on centre for about 310.My buddy has 340's.The front demo goes ahead about 15 to put him in centre.The back goes back easily.
he re are simply way too many misconceptions about demo bindings to get into all the details and specifics of different bindings.I'll speak quickly about Sal.Sal had demo bindings in both demo AND full demo.In the same model line.The "HORRIBLE" weight issue came into play because people compared a regular light weight plastic low din binding to an OBVIOUSSLY heavier high din METAL "demo binding".IN the SAME series.This is not rocket science.Compare a lower din older 957 plastic to a high din metal Equipe full demo binding that is ALSO a 957.OF COURSE the METAL demo is heavier.Compare the weight of that 957 metal Equipe to the 957 Equpe "demo" binding and there is NO difference in weight.The ONLY weight difference is that the demo track is a little bit. longer.Then there are those that say that the demo's are different.Mechanisms.NO they're not..the SAME heelpieces slide right off the track..demo/non-demo/metal/plastic.Then
there is the "sloppy" issue.Duh..the rear tracks are IDENTICAL..save for a little extra length.
A quick gander through the indemnity lists will tell you what is/was available.
BEWARE! when mounting demo bindings..SOME use a COMPLETLY different hole pattern set-up..front and rear.First time mount?This may be the LAST set of bindings(without EXPERT) hole filling) that you do.The second mount?Again you can run into the EXPERT hole filling issue.Last but not least.Some skis will NOT accept the demo mount.There is no way for there to be room.You can get into issues where sure you can mount the demo.BUT the adjustment range you sought is now toast.You can sometimes mount a plate(s)(thin 10mm)(blank) on top of a propriety plate THEN mount whatever you want wherever you want.(Ditto for the Autodrives on my bench now)